Shock-absorber.



G. 0. BROWNE. SHOCK ABSORBER. APPLIOATION FILED NOV. 16, 1911v 1 0 1 5 Patented June 4,1912.

of Illamilton and State of Ohio, have ining, formi'ng a part of this'specitication.

1'5 especially for automobiles and the like, in

Fig. 4 is a top plan view.

,of the cylinder 10 passes up through the outer cylindr cal casing 5 and the lower portion of the inner cylinder is provided with-5" CHABLES O. BROWNE,

SHOCK-ABSORBER.

a AT

Specification of Letters Patent.

Patented J une 4,1912.

Application filed November 16, 1911. Serial No. 660,568.

To all whom it may concern:

Be it known that l, (rmnnns O. BaowNn, a citizen of the United States, and a resi dent of the city of Norwood, in the county vented certain new and useful Improvements in ShocleAbsorbers, of which the following is a ull, clear, and exact description, reference being bad to the accompanying draw- The object of my invention is to provide a shock absorber, or auxiliary spring construction to be interposed between the ordinary springs and the body of the vehicle,

which the compression of the ordinary spring may be relieved by an airor liquid cushion and the recoil checked not only by an air cushion, but by vacuum pressure exerted against the force of the recoil.

The invention consists of that certain novel construction and arrangement of parts to be hereinafter particularly pointed out and claimed, whereby the compression and recoil ot the ordinary spring is relieved by telescoping parts under air and vacuum pressure. I in the drawing, Figure 1 is a front elevation of my improved shock absorber as located between the spring and frame, with the dust covering in section. Fig. 2 is a ccntral vertical section of the parts in their normal. position. Fig. 3 is a similar section with the parts drawn out under the recoil.

The frame or body of the vehicle is represented .by l, and a portion of an ordinary leat s 'iring by 2, which spring is mounted on the axle 3.

Mounted on the spring 2 and secured by clips/t, 4, is a cylindrical. casing 5, closed atthe bottom by the flanged plate 6, over the edges of which the clips 4, 4t, engage for securing the casing in position. The body of the casing is screwthreaded at 7 and secured in a recess in the flanged plate 6 by being screwed thereon.

The lower portion of the casing 5 is provided with an enlarged recess 8, within which recess the head 9 of an inner cylinder 10 fits tightly with a sliding lit. The body the cylindrical recess ll in, which fits snugly the head 12 of a piston (iIlplllDgGI 13. The

der l0, and at its upper end is provided with the flanged plate 14 for securing the plunger by clips 15, 15, to the frame 1. The telescoping parts are also provided with a sheet metal casing 16 depending from the plate It and surrounding the outer cylinder 5, to serve as a dust protector. The head 9 of the inner cylinder and the head 12 ot the plunger are each provided with a suitable washer 17,18, to make an air tight fit between the sliding parts.

plunger extends up through the inner cylinhen the parts are fitted together in their normal position as shown in Fig. 2, the cylinder 10 will be at its lowest position, with the head 9 at the bottom of its recess resting on the plate 6, and the head 12 of the piston in its uppermost position with the head engaging under the shoulder on the inner sur face of the cylinder 10 formed by the recess 11. In this position, the recess 11 below the head 12 of the piston will be filled with air,- and the recess 8 above the head'9 and outside the inner cylinder will also be filled.

with air, while the air Will beexhausted below the head 9.

\Vith the shock absorber mounted as above described intermediate the parts subjected to the movement of the spring, it will be obvious that as the body of the vehicle approaches the axle, the plunger 13 witl compress the air in the recess 11, and thus there will be a cushion for the spring. Upon the recoil, the head of the plunger will raise the inner cylinder 10 as shown in Fig. 3,

and the air in the recess 8 above the head 9 in this upward movement will also serve as a cushion for the upward movement, while at the same time the vacuum space 19 below the head '9 will cause the outer air pressure to tend to force the cylinder back to its normal position, and thus therecoil will ,be checked.

For the purpose of introducing a compressible medium into the chamber 11, or for primarily pumping compressed air into the chamber, I provide a passageway 20 through the piston 13. This passageway is provided with a check valve 21, opening inwardly to hold the medium under compression.

Instead of employing my device as a shock absorber, it will be understood, of course, that the devices may be employed as primary spring devices to be interposed wherever des1red,'an'd 1t W111 also be 8V1 dent that when used either as a shock absorber or primary spring, they may be in- .'I claim as new and desire to secureby Letters Patent, is:

1. In a shock absorber, a compression cylinder closed at its inner end, and provided with a piston, adapted to engage the head of the cylinder, an outer cylindrical casing in which the compression cylinder is fitted to reciprocate, with a vacuum chamber in the outer casing beyond the compression cylinder, whereby the movement of the piston in one direction will draw out the compression cylinder against the vacuum pressure. Y

2. In a device of the character specified,

'in combination with members to be resiliently supported, a plunger secured to one member, and an outer casing secured to the other member, with an intermediate casing fitting within the outer casing and within intermediate casing to cause the plunger to engage and draw out the intermediate casing upon the reverse movement of the plunger, the parts having a close sliding engagement, with the intermediate cas'ing l under the plunger filled with a compressible medium and a vacuum chamber in thell'outer casing beyond the intermediate casing.

3. In a device of the character specified, in combination with members to be iiresili-F ently supported, a plunger. secured as; one

member, and an outer casing secured to the other member, with an mtermedlatecasing fitting within the outer casing and with;

in which intermediate casing the plunger.

mediate casing under the plunger filled with a compressible medium and a vacuum chamber in the outer casing beyondv the inter:

mediate casing.

CHARLES 0.. BROWNE.

Attest:

MARSTON ALLEN, EARL WV. GmrrrN. 

